code: def test_noop(self):
      num_results = 10
      pbar = progress_bar_reducer.ProgressBarReducer(
          num_results, test_progress_bar_fn
      )
      self.assertEqual(pbar.num_results, num_results)
      pbar.initialize(None)
      for _ in range(num_results):
          pbar.one_step(None, None, None)
  
file_path: probability/tensorflow_probability/python/experimental/mcmc/progress_bar_reducer_test.py
imports: from tensorflow_probability.python.experimental.mcmc import progress_bar_reducer
  from tensorflow_probability.python.experimental.mcmc.internal import test_fixtures
  from tensorflow_probability.python.experimental.mcmc.sample_fold import sample_fold
  from tensorflow_probability.python.internal import test_util
label_desc: Use image node_id 1 for calling the ProgressBarReducerTest obj's underlying member method code with example usage: obj.test_noop() without return types